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Eliminate incorrect IPv6 mask guessing:

Browse Source 
RFC 2374 concept of 'IPv6 Aggregatable Global Unicast Address Format' was
deprecated by RFC 3587 12 years ago.

Before:

15:06 [1] edge# netstat -rn6 | grep 2a02:6b8::
2a02:6b8::/32                     2a02:978:2::1                 UGS         em0
15:06 [1] edge# route -6n get 2a02:6b8::
route: writing to routing socket: No such process

After:
15:07 [1] edge# /usr/obj/usr/src/sbin/route/route -n6 get 2a02:6b8::
   route to: 2a02:6b8::
destination: 2a02:6b8::
       mask: ffff:ffff::
    gateway: 2a02:978:2::1
        fib: 0
  interface: em0
      flags: <UP,GATEWAY,DONE,STATIC>
 recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire
       0         0         0         0      1500         1         0

MFC after:	2 weeks
This commit is contained in:
Alexander V. Chernikov 2015-01-16 11:17:30 +00:00
parent 0b47e42b49
commit 69c4b56a74
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=277241
1 changed files with 1 additions and 9 deletions
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10
sbin/route/route.c
View File

@ -1137,19 +1137,11 @@ inet_makenetandmask(u_long net, struct sockaddr_in *sin,
static int
inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
{
struct in6_addr in6;
if (plen == NULL) {
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
sin6->sin6_scope_id == 0) {
sin6->sin6_scope_id == 0)
plen = "0";
} else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
/* aggregatable global unicast - RFC2374 */
memset(&in6, 0, sizeof(in6));
if (!memcmp(&sin6->sin6_addr.s6_addr[8],
&in6.s6_addr[8], 8))
plen = "64";
}
}
if (plen == NULL || strcmp(plen, "128") == 0)